Life's Ratchet PDF Download

Author: Peter M. Hoffmann
Publisher:
ISBN: 0465022537
Category : Science
Languages : en
Pages : 290

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Book Description
Life, Hoffman argues, emerges from the random motions of atoms filtered through the sophisticated structures of our evolved machinery. People are essentially giant assemblies of interacting nanoscale machines.

Author: Peter M Hoffmann
Publisher: Basic Books
ISBN: 0465033369
Category : Science
Languages : en
Pages : 290

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Book Description
Life is an enduring mystery. Yet, science tells us that living beings are merely sophisticated structures of lifeless molecules. If this view is correct, where do the seemingly purposeful motions of cells and organisms originate? In Life's Ratchet, physicist Peter M. Hoffmann locates the answer to this age-old question at the nanoscale. Below the calm, ordered exterior of a living organism lies microscopic chaos, or what Hoffmann calls the molecular storm -- specialized molecules immersed in a whirlwind of colliding water molecules. Our cells are filled with molecular machines, which, like tiny ratchets, transform random motion into ordered activity, and create the "purpose" that is the hallmark of life. Tiny electrical motors turn electrical voltage into motion, nanoscale factories custom-build other molecular machines, and mechanical machines twist, untwist, separate and package strands of DNA. The cell is like a city -- an unfathomable, complex collection of molecular workers working together to create something greater than themselves. Life, Hoffman argues, emerges from the random motions of atoms filtered through these sophisticated structures of our evolved machinery. We are agglomerations of interacting nanoscale machines more amazing than anything in science fiction. Rather than relying on some mysterious "life force" to drive them -- as people believed for centuries -- life's ratchets harness instead the second law of thermodynamics and the disorder of the molecular storm. Grounded in Hoffmann's own cutting-edge research, Life's Ratchet reveals the incredible findings of modern nanotechnology to tell the story of how the noisy world of atoms gives rise to life itself.

Author: Ruth DeFries
Publisher: Basic Books
ISBN: 0465080936
Category : Science
Languages : en
Pages : 289

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Book Description
How an ordinary mammal manipulated nature to become technologically sophisticated city-dwellers -- and why our history points to an optimistic future in the face of environmental crisis Our species long lived on the edge of starvation. Now we produce enough food for all 7 billion of us to eat nearly 3,000 calories every day. This is such an astonishing thing in the history of life as to verge on the miraculous. The Big Ratchet is the story of how it happened, of the ratchets -- the technologies and innovations, big and small -- that propelled our species from hunters and gatherers on the savannahs of Africa to shoppers in the aisles of the supermarket. The Big Ratchet itself came in the twentieth century, when a range of technologies -- from fossil fuels to scientific plant breeding to nitrogen fertilizers -- combined to nearly quadruple our population in a century, and to grow our food supply even faster. To some, these technologies are a sign of our greatness; to others, of our hubris. MacArthur fellow and Columbia University professor Ruth DeFries argues that the debate is the wrong one to have. Limits do exist, but every limit that has confronted us, we have surpassed. That cycle of crisis and growth is the story of our history; indeed, it is the essence of The Big Ratchet. Understanding it will reveal not just how we reached this point in our history, but how we might survive it.

Author: Nancy J. Cavanaugh
Publisher: Sourcebooks, Inc.
ISBN: 1402281080
Category : Juvenile Fiction
Languages : en
Pages : 322

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Book Description
Move over Diary of a Wimpy Kid—there's a new journal in town and it belongs to Ratchet. "A book that is full of surprises...Triumphant enough to make readers cheer; touching enough to make them cry." —Kirkus, STARRED Review If only getting a new life were as easy as getting a new notebook. But it's not. It's the first day of school for all the kids in the neighborhood. But not for me. I'm homeschooled. That means nothing new. No new book bag, no new clothes, and no new friends. The best I've got is this notebook. I'm supposed to use it for my writing assignments, but my dad never checks. Here's what I'm really going to use it for: Ratchet's Top Secret Plan Turn my old, recycled, freakish, friendless life into something shiny and new. This Florida State Book Award gold medal winner is a heartfelt story about an unconventional girl's quest to make a friend, save a park, and find her own definition of normal.

Author: Midnite Love
Publisher: Love Den Media Publishing
ISBN:
Category : Fiction
Languages : en
Pages : 21

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Book Description
Same book new look! I have a question for you ladies. What would you do to marry the man of your dreams? Would you be willing to risk everything for love? I did, the day I met my fiancé I knew he was my soul mate. And I was willing to do whatever it took to get him no matter what the cost. My name is Pebbles and this is my story. ATTENTION: This is a short story

Author: Roy Yorke Calne
Publisher: Nova Science Publishers
ISBN: 9781631178610
Category : Science
Languages : en
Pages : 0

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Book Description
Science, like the universe, is expanding and accelerating. This book outlines the many gifts that science has bestowed upon our quality of life ranging from health, travel, and communication, but it also raises concerns about the sometimes awful consequences of science. These may be accidental and unanticipated, or deliberate, as with the development of new weapons that carry dreadful potential. After the Second World War, a chasm separated the regimes of the East and West, and the possibility that the world was heading towards a catastrophic atomic conflict was a serious worry. Science has a responsibility for its consequences, even if these are not anticipated. In view of the history of science and our current relationship with scientific advances, it would be prudent to attempt a continuing peaceful dialogue to avoid future confrontation. For the writing of this book, the author made many in-depth studies of correspondence between scientists and philosophers, including, most notably, Albert Einstein and Bertrand Russell, at Churchill College Archives in Cambridge.

Author: Jeremy England
Publisher: Basic Books
ISBN: 1541699009
Category : Science
Languages : en
Pages : 196

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Book Description
A preeminent physicist unveils a field-defining theory of the origins and purpose of life. Why are we alive? Most things in the universe aren't. And everything that is alive traces back to things that, puzzlingly, weren't. For centuries, the scientific question of life's origins has confounded us. But in Every Life Is on Fire, physicist Jeremy England argues that the answer has been under our noses the whole time, deep within the laws of thermodynamics. England explains how, counterintuitively, the very same forces that tend to tear things apart assembled the first living systems. But how life began isn't just a scientific question. We ask it because we want to know what it really means to be alive. So England, an ordained rabbi, uses his theory to examine how, if at all, science helps us find purpose in a vast and mysterious universe. In the tradition of Viktor Frankl's Man's Search for Meaning, Every Life Is on Fire is a profound testament to how something can come from nothing.

Author: Ashley & JaQuavis
Publisher: St. Martin's Griffin
ISBN: 1466874910
Category : Fiction
Languages : en
Pages : 239

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Book Description
The saga of love, loyalty, and crime continues in the next explosive book in the Cartel series from the minds of New York Times bestselling authors Ashley & JaQuavis. After the tragic and bloody end to The Cartel’s reign, Carter is forced into isolation to evade the law. With his wife, Miamor, facing federal charges and his dear brother, six feet under, Carter has never been more alone. His empire is at his feet and he has no idea how to rebuild his kingdom. The only thing that is certain is that he has to stay out the way and off the radar of the Feds until he can figure out how to get his lady out of prison. Miamor’s freedom is guaranteed—provided Carter help create and distribute a drug that will take the streets by storm. Rubbing elbows with the most notorious, ruthless leaders of the underworld will get him what he wants. But can he win at their game of murder and money?

Author: Blue Balliett
Publisher: Scholastic Inc.
ISBN: 0545510198
Category : Juvenile Fiction
Languages : en
Pages : 237

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Book Description
From NYT bestselling author Blue Balliett, the story of a girl who falls into Chicago's shelter system, and from there must solve the mystery of her father's strange disappearance. Where is Early's father? He's not the kind of father who would disappear. But he's gone . . . and he's left a whole lot of trouble behind.As danger closes in, Early, her mom, and her brother have to flee their apartment. With nowhere else to go, they are forced to move into a city shelter. Once there, Early starts asking questions and looking for answers. Because her father hasn't disappeared without a trace. There are patterns and rhythms to what's happened, and Early might be the only one who can use them to track him down and make her way out of a very tough place.With her signature, singular love of language and sense of mystery, Blue Balliett weaves a story that takes readers from the cold, snowy Chicago streets to the darkest corner of the public library, on an unforgettable hunt for deep truths and a reunited family.

Author: Christopher Emdin
Publisher: Beacon Press
ISBN: 0807089516
Category : Education
Languages : en
Pages : 264

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Book Description
A revolutionary new educational model that encourages educators to provide spaces for students to display their academic brilliance without sacrificing their identities Building on the ideas introduced in his New York Times best-selling book, For White Folks Who Teach in the Hood, Christopher Emdin introduces an alternative educational model that will help students (and teachers) celebrate ratchet identity in the classroom. Ratchetdemic advocates for a new kind of student identity—one that bridges the seemingly disparate worlds of the ivory tower and the urban classroom. Because modern schooling often centers whiteness, Emdin argues, it dismisses ratchet identity (the embodying of “negative” characteristics associated with lowbrow culture, often thought to be possessed by people of a particular ethnic, racial, or socioeconomic status) as anti-intellectual and punishes young people for straying from these alleged “academic norms,” leaving young people in classrooms frustrated and uninspired. These deviations, Emdin explains, include so-called “disruptive behavior” and a celebration of hip-hop music and culture. Emdin argues that being “ratchetdemic,” or both ratchet and academic (like having rap battles about science, for example), can empower students to embrace themselves, their backgrounds, and their education as parts of a whole, not disparate identities. This means celebrating protest, disrupting the status quo, and reclaiming the genius of youth in the classroom.